Converting the horizontal into the vertical means nothing else but to detach from the perception of time. Being horizontal means living either in the past or in the future with all its fears, hopes and other plans. You're never in the horizontal now. Therefore, meditating on the vertical plane is very important.
Here this music supports you. The vertical plane is timeless - spaceless. It doesn't go from A to B and so on. It's only going up - higher and higher... Starting now. On the vertical line you either go deep into the innermost part of the body or up into the light. The future and the past can be overlooked from the present. This state is that of eternity. Eternity is vertical - the eternal now.